Giddings & Lewis 501-04708-00 Executive Control Board

Technical SpecificationsModel：501-04708-00 Brand：Giddings & Lewis Product Type: Rack mount executive control PCB assembly,486 based CNC main processor board

Module Feature:Function: Executive main control board for G&L CNC system, powered by Intel 486 CPU. Responsible for G-code interpretation, multi-axis motion interpolation, PLC logic execution, I/O management and machine alarm handling for heavy horizontal boring mills and machining centers. Processor: Intel 486 CPU Supply: 5VDC Memory: Onboard RAM and ROM for firmware, part programs and machine parameters Bus interface: Industrial parallel backplane bus for data exchange with peripheral I/O and axis modules Hardware watchdog: Watchdog circuit for system crash protection LED indicators: POWER, RUN, FAULT diagnostic lights Hardware self-diagnosis: Memory self-test, backplane bus integrity check, watchdog timeout detection Programming software: G&L proprietary CNC software for parameter configuration, program download and board diagnosis

Electrical ParametersRated supply:+5VDC Power consumption:Max 13W

Mechanical & Structure:Mounting:Rack slot mount Weight:1.1kg Protection class:IP20

Environmental:Operating temperature:0℃ ~ +55℃ Ambient humidity:5~85% non-condensing Certification:CE Status:Manufacturer discontinued legacy CNC executive control board

System compatibility501-04708-00 belongs to Giddings & Lewis legacy CNC control family. Compatible with matching system backplane, digital I/O, analog servo and encoder interface modules. Widely fitted on vintage G&L heavy horizontal boring mills and large machining centers.

Function501-04708-00 is executive control board manufactured by Giddings & Lewis. It is the core computing board of older G&L CNC system. The onboard Intel 486 processor handles G-code decoding, multi-axis trajectory interpolation and PLC logic operation. It communicates with I/O and servo interface modules via backplane bus to realize closed-loop machine motion control. It is a rare legacy main CPU spare part for old heavy G&L CNC machine tools.

InstallationFollow lockout/tagout safety procedure before installation. Cut off system 5VDC control power. Insert 501-04708-00 board into rack slot and secure connectors. Verify backplane wiring before power on. Download machine parameters and part programs, run board self-test and test axis and I/O functions.

InterfaceGold finger backplane connector,on-board POWER / RUN / FAULT LED indicators for Giddings & Lewis 501-04708-00.

DiagnosticBoard fails to boot:Check +5V power supply, board seating or memory fault. FAULT LED lit:Watchdog timeout, memory failure or backplane communication error. No axis motion:Wrong system parameter configuration or peripheral interface module fault.

Product Brief501-04708-00 is Giddings & Lewis legacy executive control CPU board with Intel 486 processor,for heavy CNC boring mill G-code parsing and multi-axis motion calculation,discontinued CNC main control spare card.